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转换机构法分析Ⅲ级机构的速度和加速度
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作者 高榴瑛 《江苏工学院学报》 1990年第2期92-98,共7页
介绍一种不需要辅助媒介点的分析Ⅲ级机构运动的方法。对于单自由度机构,选择不同的起始构件,可以将原Ⅲ级机构转换成Ⅱ级机构,而后者的运动分析方法较为简易。再通过原机构与转换机构之间的关系确定原Ⅲ级机构的速度及加速度.
关键词 Ⅲ级机械 转换机构法 机构
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刀架转位机构误差分析及改进设计
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作者 刘振 《重型机械》 2011年第2期68-71,共4页
针对刀架转位机构存在纵向加工误差的问题,利用转换机构法计算误差,并分析了产生误差的主要因素。采用凸轮机构代替原曲柄连杆机构,使该机构的纵向位置误差由0.08~0.10 mm减小到0.03~0.05 mm。
关键词 机械学 误差分析 转换机构法 回轮转位机构
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A framework to create video-transition effects
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作者 卜佳俊 赵传禹 陈纯 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2005年第B08期58-65,共8页
The paper presents a framework for developing a variety of video transition effects. The framework is designed to deal with the problem of inefficiency for programmers to generate more and more diversified video trans... The paper presents a framework for developing a variety of video transition effects. The framework is designed to deal with the problem of inefficiency for programmers to generate more and more diversified video transition, which is caused by excessive coupling between the sub-modules of the system. So the framework is designed to be modular, flexible and extensible. Based on the analysis of common features of different effects, the implementation of video transition effect is divided into 4 sub-odules, each of which can be designed and developed independently. Furthermore, these sub-modules can be easily sub- stituted, modified and reused. We present a formal description of our framework, and give typical study cases to show the extensive utility of the framework. 展开更多
关键词 Video transition FRAMEWORK Mapping method Source region Target region
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